Incandescent-lamp socket



(No Model.)

H. J. GUTMAN. INOANDESGENT LAMP SOCKET.

No. 447,315. Patented Mar. 3,1891.

iJN rirn' STATES ATENT prion.

HARRY J. GUTMAN, or" has aromas, IOWA.

INCANDESCENT LAMP sooner} srnoxrronrron forming part of Letters Patent hlo. 447,315, dated March 3, leer Application filedseptemher 29, 1890. Serial lie. 386,571; (NomoliclJ To all zchpjn it may concern:

Be it known that I, HARRY J. GUTMAN, a citizenof'tfhe United States of America, residing at "Des Moines, in the county of Polk and State of Iowa, have invented a new and useful Improvement in Electrical Connections, of which the following is a specificaa working resistance the latter may be readily and effectively out in and out of circuit. In order to accomplish these results and produce a practical coupling, it is necessary that the contact should be relatively perfect, that the continuity of the insulationshould be preserved at the connection, that the parts connected should be securely held togeth r in order to maintain perfect contact, so that short-circuiting cannot occur. It is also necessary that the completed connection should be small in size and capable of ready attachment and detachment. 5

My invention, in conjunction with an incandescent lamp, consists in an interior oonnecting portion, to whichlhe main leads are secured, an outer jacket-piece surrounding the interior portion, which latter is chambered at its lower end portion to receive the upper cylindrical p rtion of the lamp, the enteringleads hein g eiectrically connected with platepieces on the interior of the chambered portion. The upper portion of the lamp has'vertical moving plugs or pins surrounded by a yielding pressure, said plugs being electrically connected with the filament of the lamp.' Fixed to one of said pins or plugs is a thumbpieco within an angular slot in the casing of the lamp.

My invention consists, further, in certain details of construction and,,arrangement of parts, hereinafter more fully described and. set forth, reference being bad to the accompanying drawings, in which Figure 1 is an enlarged vertical section.

Fig. 2 is a sideelcvation, showing the parts about'to be joined. Fig. 8 is an enlarged letail View of one of the metall c casings. I 1g.

4 is a side elevation showingthe angular appear hereinafter that its utility is not lim ited to this-application alone.

A represents the main leads, which are so} Fig. 5 is a detail cross-sectional. view cured by binding screws a a to the augulari' l metallic connections a'o", Fig. 1, the upper arms of which are held against adivi'sional insulating-plate .B prefe rably of vuloauite e integrally formed with the rulcanite interio'rj portion 13 the lower arms of said angularv connections a' a being also held upon the upper face of said interior portion B is a cap-piece secured to the (llYlSlOllZlL platc"B.-

4 v Secured to the lower arms of the angular connections a a are wires 1) b, which extend downwardly through the vulcanite of the inv terior portion B and arev connected at their lower extremities to contact-plates C C, which are exposed andheld within an annular cha n-- bored part of the interior portion B The interior or insulating portion B is exteriorly surrounded by a removable metallic jacket or casing D, having formed thereon a flanged and slotted rim b", said slot being shown in the enlarged View, Fig. 1. This removable casing or jacket D is held upon the interior portion by means of the screw (:1, which trav-.

els within a slot, as shown in Fig. '2. The lamp E is secured in the usual manner to the part E which latter has vertical bores e 6 extending therethrough, metallic casings e 6 being inserted within said vertical bores c 6, one of said casings being shown in detail in Fig. I I and contact-buttons H H each'of said plugs or pins beinglocated, respectively, within the Vertical bores c e and each surrounded by spiral springs h h. (Shown more clearly in Fig. 1.) These metallic casings are slotted, as shown in Fig. 3, at h", and thus adapted to permit transverse pins h', secured to the lower ends of the said pins or plugs f f to travel in said slots h" and thus limit the extreme upward normal movement of the sa'id I also provide pins or plugs ff 2 litigate plugs ff and buttons ll H when the two parts are not joined. The pin'attached to the contacobutton l-li terminates at the end of its casing c, while the pin f is extended below the end of its casing e and is bent at right angles, its extending arm being screwthreaded and thus adapted to permit; the attachment of a linger-piece ll, which latter trav'els within and is held by an approximately angular slot il ,(Shown clearly in Fig. l.)

Jere pins cxtcnding from each side of the periphery of thenpper portion of the part 1?, Fig. 5, and are adapted to be inserted within the vertical slots j, Fig. 2, formed on each side of the casing D and in the insulat lug material, said slots extending from the lower edge of the upper part to the slot in the flanged rim 1)".

The platinum leads to the filament are connected to the metallic conducting-casings.

if desired, the linger-piece ll may be made of insulating material. I

The union of the two parts, the upper one of which consists of the nterior portion l3 and the removable casing D, holding the leadsto be connected in circuit, and the lower part Er, is effected as follows: The lugs J of said part E are inserted Within the vertical slots n the upper part, the upper portion of part l being Within the lower chambered portion of the upper part, and when the lugs J reach the point of coincidence with the slot in flanged rim 1)" the lower part may then be turned or rotated in either direction forming a. bayonet-joint connection. The buttons of too plugs or pins ll H extending slightly beyond the meeting face of the part E when the latter is inserted within the chainbored part of the interior portion il impinge against the contact-plates 'C C, and thus compress the springs h h, which cause the bhttons of the pins H H to bear against said plates and maintain contact. The cir cult with platinum leads of the lamp is now completed from the main leads through angular connections a ct, Wires b h, contact-plates t? f}, bu ttous and pins ll ll' springs 71 h, and casings c c. l I

It is apparent that any other working resistance u. or be connected in circuit by my device, or that the severed portions or ends of a. wire may be united together as well as a lamp.

litctcrriug to i, it will be seen that the ot a. circuit are connected or & (her, and that in. this l 'l' :m and construct both the pins ll ii in i some manner and dispense with the fingerpiccc ll and provide cappieces ll, which are adapted to be screwed upon. the solid vulcanportions.

ll hen the lamp-socket is coupled. by the u, the two buttons it n act with the plates circuit through the l filament of the lamps, the plugs ff and the buttons H H being in the highest position assumed when the two parts are joined, the finger-piece H being within the vertical portion of the angular slot H and near the 1111- per extremity thereof, the springs h h being compressed. hen the two parts are disconnected, the buttons H II and plugs ff advance vertically slightly, the finger-piece H being then at thesaid extremity of the vertical portion of the slot 1-1, which is uniform in length with the slot 72..

Assuming the parts to be joined and contact made, in order to cut or break connection the operator depresses the finger-piece 1-1, engaging the'latterjin the horizontal poition of the angular slot:

Having thus described my invention, what claim as new, and desire to secure by Letters Patent, is-

1. In a combined electrical connection and switch, the two meeting sections, one of which is provided with contact-plates to which the main leads are electrically connected, the other part having plugs or pins acted upon by yielding pressure, one of said pins having secured thereto an actuator operated from the exterior and held by an approximately angular slot to break contacx, as and for the purposes set forth.

:3. In acombined electrical switch and con tact, the combination of meeting parts or sections, one of which has a slotted chambered portion, contact-plates electrically connected with the main leads, and an exterior casing having slots, the other one of said parts or sections having lugs adapted to enter the slots of'the chambered part of the-interior portion and casing and having also beveled bores which are mcta-llically lined, pins or plugs within said bores acted upon by yielding pressure and normally bearing against the contact-plates when the connection is effooted, one of said pins or plugs having a linger-piece traveling within an approximately angular slot, to operate as and for the purposes scl. forth.

In an electrical connection, the two parts or sections to which the loads of the circuit are respectively connected, having contactplates electrically connected through insulating material with said leads carried by one part or section, and movable contactplugs having buttons thereon adapted tocontact with the plates carried by the other part or section, slotted metallic bores embedded in insulating material, pins adapted to travel within the slots of the bores, and spiral springs surrounding the contact'plugs, together with a bayonet-joint connection between the two parts or sections, as set forth.

HARRY J. GU'llllii iN.

"'il'itncssizisz :3. (3. SWEET,

0. Pictures. 

